Casing-spear.



J. J. GUISE.

CASING SPEAR. APPLICATION man OCT- a. 1914.

Patented June 29 1915.

01mm A- v spear for removin 's as err on.

radon J. nurse, or rannuassune, 'wnsr VIRGINIA.

. castes-swan,

a iases;

To all whom z'i-mag) "concern: z

Be it known that-I, Jncoe J. a citizen of the United States, residing at -Parkersburg, in the county ofWoo'd and State of West Virginia, have invented a new anduseful Casing-Spear; and il do hereby declare'the following to be a full, clear, and exact description of the invention, such as will enable other skilled in the art to which it'appertains to make. and use the same. "I

This invention relates to an'improved tr p. or extracting casings from Artesian or oil wells.

As an object of the invention 'iti's the aim to provide a spear having a contracted portion, which is substantially triangular in cross section, and with which a plluralit of wedges, having outer teeth coiiperate, t ere being a wedge adjacent each-face of the triangular portion (which is'tapered) so that upon theinitial upward movement of the spear, that is, after the same has been ill-- serted' in a casing ofa well, the wedges will move: outwardly, the teeth" thereof bitinginto the inner circumference of the casing,

and upon subsequent upwardgmo'vement of the spear the casing will be extracted or rcmoved. I V One of'the features of the invention is the provision of a. spring. tensioned' collar for holding the wedges in their ii .wardhormal position upon thetapered triangular part, the. collar being provided, with a; latch, which, when the collar is. moved "downwardly against the tension of the spring, will extract itself from a recess in the tapered triangular part and automatically seat itself"- in a depression of the triangular part adjacent said recess, for holding the collar so positioned that-is, downwardly, whereby thewedges may also move downwardly, which wedges are "provided with dove-tailed con- ,nect-ions with the facesof said triangular part. Y it Another feature of the ln-ventlon is the provision of a guiding device between the collar and the triangular solid portion of the SPQ 'In practical fields the details offconstruc tion may necessitate alterations, falling within the scope of, what is claimed.

section.

' Sp fi -anon of Letters Patent- Patented June 29, 1915. ap lication filed coroner s, 1914.. Serial No. 364,751.

The invention comprises further features and combination of parts, as hereinafter set forth, shown in the drawings and claimed.

' In the drawings :Figure 1 is a view in side elevation of the improved casing trip spear constructed in accordance with the invention', showing the toothed wedges in their normal position. Fig. 2 is a View in side elevation and partly in section showing the toothed wedges in their abnormal positions ready'to engage the inner circumference of a casing. Fig. 3 is a longitudinal sectional view through the casing trip spear. Fig. 4 -1s-a'sect1onal View on hne H of Fig. 1.

Fig. .5 is a detail perspective View showing the strip collar and the tapered portion.-

'(which is triangular in cross section) of the spear, showing the means for guiding the collar and 1 holding it spaced apart from the triangular part. Fig. 6 is a detail view ing the collarseparated from the triangular part.

Referring more especially to the drawings, 1 designates the bodyas a whole, and 2 the tapered screw extension thereof designed for connection to any suitable device (not shown) of the usual character, wherebythe spear may be lowered into the casing. Body is cut away to form ah axially extending shank 3, the extreme lower end 'of which is provided with threads 4:. The shank.3 is provided with a tapered part or portion 5, which is substantially triangular in cross Each face 6 of the triangular shaped part or portion is. provided with a dove-tailed groove 7, to receive the .dovetailed rib 8 of each segmental wedge 9, the outer face of which is provided with teeth 10, which, when each wedge is allowed to move downwardly on the tapered portion from the shoulder 11 of 'the spear, engage the inner circumference of a casing to be extracted or withdrawn from an 'Artesian or other well. Upon the reduced cylindrical portion 13 (which is between the threaded portion 4 1 and the tapered portion 5) of the shank 3' v is a trip collar 14. One face of the collar 14 is provided with a hollowed out portion 15, the other face of the collar 14 is provided with an elongated recess 16' and a'circular or annular recess 17. Threaded at-l8 in the recess 17 is a guide lug or projection 19 entering a correspondingly shaped bore 20 of the triangular tapered part or portion 5, so thatwhen the collar is moved upon the cylindrical part 13 of'theshank,

it is guided relative to the portion 5, that is, amally, andzis prevented from moving partially annularly. v The tapered part 5 is constructed with an additional cylindri-- cal bore 21. Pivoted at 22 n the elongated '23, the arm 24 of'which is normally re-' the angular trip dog to the position shown "in Fig. 8 and in contact with the shoulder spring 30. In moving the collar 14 in this recess 16 is an angular dog or trip member.

ceived in the bore 21, that is, when the collar 14 is in contact with the shoulder 25. Where the tapered part 5 adjoins the cyli'n-.- drical part 13 of the shank,iit is provided with a depression 26 adjacent thebore 21. in a counter recess 27 of the bottom of the recess 16 is a coil spring 28 hearing upwardly against the arm 29 of the angular trip dog. 23, and when the collar 14 is [moved downwardly against the action or tension of; the spring 30 by mariual means and 'sufficiently'so that the arm 24 is free of the bore '21, the coil spring will kick or tilt 3l,"so that-the free rounded end .of the arm 24 will engage the depression 26 of the taperedpart '5, tl1ereby holding the collar, 14 downwardly against the tension of the manner the guide member or projection 19 guides the collar axially with relation to the nut on the threaded part 4, as is usually the case, the present spearis provided with a tapered pointed piercmg member 33, whereby the top ofthe casing of the Artesian or other oil well. may be swaged. out to the required size very easily, whereas the 'blunt nut (which ,isusuallyemployed) renders this function or feature hard or difiicult.

A second collar 34 is threaded upon the, threaded portion 4- of the shank and in-cons tact with the tapered or pointed piercing member 33, as shown at 35, thereby assisting in looking the collar 34 and the member 33 in place. The collar 34 on one face is provided witha hollowed out portion 37, be-

tween which and the hollowed out portion or 4 recess-15 the coil spring 30 is interposed. After a. casing has beenegrtracted or removed, and' it is desired to restore or permit the wedges to assume their normal positions, a suitable tool-maybe inserted between the tapered portion 5and the casing adjacent where the angular'trip-dog is positioned, and by a suitable manipulation of the tool the arm may be jarred from the depression 2.6, 'snfliciently to allow the arm 24 t 'enterthe bore 21, the action of the spring 30 will. then throw the collar'upwardly, and restore the .wedges to the positionsshown the r. downwardly than shown in Fig. 2,-the collar 14imay1be moved sufficiently to per- 20, then by a slight partial rotary movement of thecollarl4, theend of the projection 19 will engage the lower end wall or shoulder wedges to be moved downwardly farther the Figs. land 3. However, if it is desired to permit the wedges 9- to move far- V .mit the projection 19 to be free of the bore '90 '25 of the-tapered part 5. LIn permitting the than that shown in Fig. 2, said wedges will engage the inner circumference of a slightly larger Artesian or oil well casing. It -will be observed that the threaded bore of thepiercingor pointed member 33 is of suflicient length to permit of vertical adulating the tensioning of the spring 30.

is claimed as new and useful-is:-

form a shank having a shoulder, the lower .justment upwardly or downwardly for reg- The. invention having been set forth, what 3 A casing trip'spear comprising a body,- portion having its lower end reduced to end of the body above the shoulder being a cut away to form a tapering-part triangular in cross section, which tapering part is provided; with downwardly diverging faces,

wedges. respectively mounted to slide long1 tudi'nally on said faces, a nutthreaded on.

the shank, a piercing {member threadedon the lower extremity of the shank below the nut and adjacent thereto, a collar-forming an abutment for the wedges slidably mounted onthe shank intermediate'the shoulder and nut, a coil spring disposed around the shank intermediate thelnut and the collar for urging the collar against' the shoulder,

said tapering part'havlng a pair of elongated cylindrical recesses, a pin rigidly con-1 nected to one faceof the collar and telescoping into one of said recesses of the tapered part to 'gljlide the collar, said collar having a depresslon, an angular trip member pivoted in said depression and. provided with springtensioning. means, oneof the arms of saidangular trip member normally telescoping into the other recess of said tapered name to this specification in the presence of part, said shfoulder having a depression adtwo subscribing witnesses. jacent one 0 the recesses to receive the re- Y cessengaging arm of the trip member when JACOB GUISE' 5 the collar moves downwardly to hold the Witnesses:

collar separated from the shoulder. J. W. VANDERVORT, In testimony whereof I have signed my L. S. MARLOWE. 

